Hydronic heating system

LILJohn

I’m designing a heating system for a class project .
My heating system for my project is a one pipe system. My main is one pipe I have closely space tease for each zone and each zone is installed with an isolation zone valve, control valve, check valve and globe valve and independent drains.The htu in each zone are piped in series. I’m doing the math and accounting for the temperature drop In each zone and adjusting the emitter size for the zone that follows . Does this set up work ? I’ve. Correctly sized the primary circulator so each zone doesn’t need a circulator ? I have independent circulators for my radiant in floor heating

hot_rod

looks like a series primary loop

So every takeoff with a set of close tees needs a circulator sized for that circuit

Yes you loose temperature at each take off that is operating

With temperature and gpm numbers for each set of tees you can calculate that

mattmia2

or use monoflo tees but you definitely would need to write and solve the system of equations to make monoflo work here.

hot_rod

Here mare some examples of a diverter "one pipe system. It takes a specific tee fitting. The math to calculate the system you show would be complex. You have temperature and pressure drop tom account for. It is still a series circuit, so the last take offs would be cooler SWT.

Various primary secondary methods. This shows the boiler as a secondary.

The boiler, if a low pressure drop, could be in the loop also.

There is a misconception that then primary circulator needs to be at least as great as all the secondary flow rates.

Actually that primary circulator is sized by the overall temperature drop when all secondaries are running. Generally 15- 30 ∆ around the loop.

A larger delta design when the secondaries have a wider range of temperatures, as yours do.

A tighter delta when secondaries are similar in temperature

Higher temperature circuits first.

LILJohn

ok thanks guys . Does the system make sense ?

EBEBRATT-Ed

I don't want to knock what your trying to do. Yes, I think it will work but as mentioned above you need zone circulators to create a Pd so the water will flow.

There may be simpler was to do this but it looks like it will work

mattmia2

https://forum.heatinghelp.com/discussion/comment/1897000#Comment_1897000

if you wanted to be completely insane about it you could do it with different size pipe in the main between the tees vs the rest of the main and sizing the branches to get the right flow in the branches. I would not recommend building that as a production system but it could be an interesting academic exercise.

like when i tried to design a simulated processor without a clock and gates but with signals that all propagated at equal speeds through the different sections. probably would have got a better grade if I explained that better.